QOJ.ac
QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #409639 | #8339. Rooted Tree | wly_sh# | AC ✓ | 1123ms | 3652kb | C++14 | 497b | 2024-05-12 13:59:04 | 2024-05-12 13:59:04 |
Judging History
answer
#include<bits/stdc++.h>
#define ll long long
using namespace std;
const int N=1e5+100;
const int mod=1e9+9;
ll ksm(ll x,ll p){
ll ans=1;
while(p){
if(p%2) ans=ans*x%mod;
x=x*x%mod;
p=p>>1;
}
return ans;
}
int main(){
ios::sync_with_stdio(false);
cin.tie(0),cout.tie(0);
ll m,k;cin>>m>>k;
ll ans=0,x=1,t;
for(ll i=1;i<=k;i++){
ans= (ans + x*m%mod)%mod;
t=(i*(m-1)+1)%mod;
x= (x + m*ksm(t,mod-2)%mod) %mod;
}
cout<<ans;
return 0;
}
// 99 10000000
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3496kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3516kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 70ms
memory: 3652kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 752ms
memory: 3600kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3572kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 820ms
memory: 3584kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 461ms
memory: 3568kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1111ms
memory: 3592kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 203ms
memory: 3584kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 609ms
memory: 3552kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 361ms
memory: 3596kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 324ms
memory: 3588kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 968ms
memory: 3592kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1118ms
memory: 3588kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1123ms
memory: 3552kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1123ms
memory: 3528kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed